17x21x4 MERV 8 Air Filter

17x21x4 MERV 8 filters made and manufactured by FilterBuy. Actual Size 17.00x21.00x3.63". Traps and blocks over 90% of pollen, dust mites, mold, larger dust particles, and more.. Ideal for standard and residential commercial use. Designed to last 90 days. Replace regularly for optimum performance.. Free shipping on all orders!

Source reference: https://filterbuy.com/air-filters/17x21x4/merv-8/